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- From: ben@osiris.usi.utah.edu (Ben Pratt)
- Subject: Re: Sysvmm not releasing pages ?
- Message-ID: <1992Nov20.212015.4708@fcom.cc.utah.edu>
- Sender: news@fcom.cc.utah.edu
- Organization: Utah Supercomputing Institute
- References: <1ej7n0INNjgs@grasp1.univ-lyon1.fr>
- Date: Fri, 20 Nov 92 21:20:15 GMT
- Lines: 35
-
- In article <1ej7n0INNjgs@grasp1.univ-lyon1.fr>
- Christophe.Wolfhugel@grasp.insa-lyon.fr (Christophe Wolfhugel) writes:
-
- > Are there any known problems with 3.2(.0) memory manager not releasing
- > pages. After 24 days of activity, my 62 Mb swap went full. I killed all
- > I can specially the memory consuming stuff (inn, named, some over
- > servers). Stopped also nfs server.
- >
- > The machine is now nearly idle, and still...
- >
- > # lsps -a
- > Page Space Physical Volume Volume Group Size %Used ...
- > paging00 hdisk1 extvg1 40MB 76 ...
- > hd6 hdisk0 rootvg 32MB 90 ...
- >
- > (16 Mb of real memory).
- >
- > I remember that with 3.1.1 (and a restart every day or so) but its the
- > first time I get into the same trouble with 3.2 !
- >
- > Any clues ?
-
- Some... after using the ubiquitous ``monitor'' utility and doing some of
- my own exploration, I and some IBM'ers here noticed that AIX 3.2.x would
- report huge amounts of memory in use during times of very light to
- non-existant load. After talking with the kernel group in austin (I am
- getting this second hand from the IBM'er here who talked to them) it
- seems that AIX will ``reserve'' all this memory and report it in use,
- until it is actually needed and then release it... I am sure there is a
- more eloquent way to state this, though I am not sure the theory, once
- eloquently stated, will be so admired. Can you Austin IBM dudes
- elaborate, or are we not stating the problem well?
-
- Ben
- ben@snow.usi.utah.edu
-